public class HardDisk extends Object{
	int amount;
	HardDisk(){
	}
	HardDisk(int m){
	this.amount=m;
	}
	public int getAmount(){
	return amount;
	}
	public void setAmount(int m){
	this.amount=m;
	}
	public String toString(){
	return "HardDisk.toSring has been overrided";
	}
	public boolean equals(){
	return true;
	}
}